/* ===== Cases ===== */
.cases-meta {
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
  margin-bottom: 2.5rem; flex-wrap: wrap;
}
.cases-filter { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.cases-filter button {
  display: inline-flex; align-items: center; gap: 0.375rem;
  padding: 0.5rem 1rem; border-radius: var(--r-pill);
  border: 1px solid var(--hairline); background: var(--canvas);
  font-size: 0.8125rem; font-weight: 500; color: var(--body-strong);
  cursor: pointer; transition: all .15s ease;
}
.cases-filter button.is-active { background: var(--ink); color: var(--on-primary); border-color: var(--ink); }
.cases-filter button:not(.is-active):hover { border-color: var(--ink); }

/* Style 1: Number-forward */
.cases-grid--numbers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.case-card-num {
  background: var(--canvas); border: 1px solid var(--hairline);
  border-radius: var(--r-lg); padding: 1.75rem;
  display: flex; flex-direction: column; gap: 1.5rem;
  min-height: 17.5rem;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.case-card-num:hover { border-color: var(--accent-terra); box-shadow: 0 0.25rem 1rem rgba(0,0,0,.06); }
.case-card-num__desc {
  font-size: 0.8125rem; color: rgb(198, 69, 69); line-height: 1.7; margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height .3s ease, opacity .2s ease;
}
.case-card-num:hover .case-card-num__desc {
  max-height: 6rem;
  opacity: 1;
}
.case-card-num__head { display: flex; align-items: center; justify-content: space-between; }
.case-card-num__title {
  font-family: var(--font-display); font-size: 1.25rem; font-weight: 500;
  color: var(--ink); margin: 0; line-height: 1.35;
}
.case-card-num__metrics {
  display: grid; grid-template-columns: 1fr 1.5rem 1fr; align-items: center; gap: 0.5rem;
  padding: 1.25rem 1rem; background: var(--surface-soft); border-radius: var(--r-md);
}
.case-metric { text-align: center; }
.case-metric .label {
  font-size: 0.625rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 0.375rem;
}
.case-metric .value {
  font-family: var(--font-display); font-size: 1.625rem; font-weight: 500;
  color: var(--ink); line-height: 1;
}
.case-metric .value .unit { font-size: 0.8125rem; color: var(--muted); margin-left: 0.125rem; font-family: var(--font-body); font-weight: 500; }
.case-metric--after .value { color: var(--primary); }
.case-card-num__arrow { color: var(--muted); display: flex; justify-content: center; }
.case-card-num__foot {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.75rem; color: var(--muted);
}

/* Other cases subsection */
.cases-subsection {
  margin-top: 3rem; padding-top: 2.5rem;
  border-top: 1px solid var(--hairline);
}
.cases-subsection__label {
  font-size: 0.6875rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--primary); margin-bottom: 1.25rem;
}
.other-cases-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem;
}
.other-case-card {
  background: var(--primary-soft); border: 1px solid var(--primary-disabled);
  border-radius: var(--r-lg); padding: 1.5rem;
  display: flex; flex-direction: column; gap: 0.75rem;
  transition: transform .2s ease, box-shadow .2s ease;
}
.other-case-card:hover { transform: translateY(-0.375rem); box-shadow: 0 0.5rem 1.5rem rgba(74,111,165,.12); }
.other-case-card__tag {
  font-size: 0.6875rem; letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--primary); font-weight: 500;
}
.other-case-card__title {
  font-family: var(--font-display); font-size: 1rem; color: var(--ink); margin: 0; font-weight: 500;
}
.other-case-card__desc {
  font-size: 0.8125rem; color: var(--body); line-height: 1.7; margin: 0;
}

/* Style 2: Story card */
.cases-grid--stories { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.case-card-story {
  background: var(--canvas); border: 1px solid var(--hairline);
  border-radius: var(--r-lg); padding: 1.75rem;
  display: flex; flex-direction: column; gap: 1.125rem;
  min-height: 20rem;
}
.case-card-story__cover {
  height: 8.75rem; border-radius: var(--r-md);
  background: var(--surface-card); position: relative; overflow: hidden;
}
.case-card-story__cover--terra { background: linear-gradient(135deg, var(--accent-terra-soft) 0%, var(--accent-terra-soft) 60%, rgba(196,122,90,0.25) 100%); }
.case-card-story__cover--blue { background: linear-gradient(135deg, var(--primary-soft) 0%, var(--primary-soft) 60%, rgba(74,111,165,0.25) 100%); }
.case-card-story__cover--teal { background: linear-gradient(135deg, var(--accent-teal-soft) 0%, var(--accent-teal-soft) 60%, rgba(93,184,166,0.25) 100%); }
.case-card-story__cover-label {
  position: absolute; bottom: 0.875rem; left: 0.875rem;
  font-size: 0.6875rem; letter-spacing: 0.12em; color: var(--muted);
}
.case-card-story__cover-pattern {
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 80% 20%, rgba(20,20,28,0.06) 0%, transparent 30%),
    repeating-linear-gradient(45deg, rgba(20,20,28,0.03) 0 1px, transparent 0.0625rem 0.75rem);
}
.case-card-story__title { font-family: var(--font-display); font-size: 1.1875rem; font-weight: 500; color: var(--ink); margin: 0; line-height: 1.4; }
.case-card-story__desc { font-size: 0.875rem; color: var(--body); line-height: 1.8; margin: 0; }
.case-card-story__foot { display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding-top: 0.5rem; }
.case-card-story__chip { font-size: 0.6875rem; color: var(--muted); letter-spacing: 0.12em; }

/* Style 3: Table-style */
.cases-table {
  width: 100%; border-collapse: collapse;
  background: var(--canvas); border: 1px solid var(--hairline);
  border-radius: var(--r-lg); overflow: hidden;
}
.cases-table thead th {
  text-align: left; padding: 1rem 1.5rem;
  font-size: 0.6875rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--muted); font-weight: 500;
  background: var(--surface-soft); border-bottom: 1px solid var(--hairline);
}
.cases-table tbody tr { border-bottom: 1px solid var(--hairline-soft); }
.cases-table tbody tr:last-child { border-bottom: 0; }
.cases-table tbody tr:hover { background: var(--surface-soft); }
.cases-table td {
  padding: 1.375rem 1.5rem; vertical-align: middle; font-size: 0.875rem; color: var(--body-strong);
}
.cases-table td.case-title { font-weight: 500; color: var(--ink); font-size: 0.9375rem; }
.cases-table td.case-metric-cell {
  font-family: var(--font-display); font-size: 1.125rem; color: var(--ink);
}
.cases-table td.case-metric-cell .arrow { color: var(--muted-soft); margin: 0 0.5rem; font-family: var(--font-body); font-size: 0.8125rem; }
.cases-table td.case-metric-cell .after-val { color: var(--primary); }

/* ===== Process ===== */
.process-steps {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 0;
  position: relative;
  margin-top: 1rem;
}
.process-steps::before {
  content: ""; position: absolute; left: 8.33%; right: 8.33%; top: 1.5rem;
  height: 1px; background: var(--hairline); z-index: 0;
}
.process-step {
  position: relative; padding-top: 0; text-align: left; padding-right: 1rem;
  z-index: 1;
}
.process-step__num {
  width: 3rem; height: 3rem; border-radius: 50%;
  background: var(--canvas); border: 1px solid var(--hairline);
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 1rem; color: var(--ink); font-weight: 500;
  margin-bottom: 1.25rem;
}
.process-step--active .process-step__num { background: var(--primary); color: var(--on-primary); border-color: var(--primary); }
.process-step__phase {
  font-size: 0.625rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 0.375rem;
}
.process-step__title { font-size: 0.9375rem; font-weight: 600; color: var(--ink); margin: 0 0 0.5rem; }
.process-step__desc { font-size: 0.8125rem; color: var(--body); line-height: 1.6; margin: 0; padding-right: 0.5rem; }

.process-callout {
  margin-top: 3.5rem;
  background: var(--surface-cream); border-radius: var(--r-lg);
  padding: 2rem 2.5rem;
  display: grid; grid-template-columns: auto 1fr; gap: 2rem; align-items: center;
}
.process-callout__label {
  font-family: var(--font-display); font-size: 1.375rem; font-weight: 500; color: var(--ink);
  white-space: nowrap;
}
.process-callout__body { font-size: 0.875rem; color: var(--body-strong); line-height: 1.8; margin: 0; }

/* ===== About ===== */
.about-grid {
  display: grid; grid-template-columns: 22.5rem 1fr; gap: 5rem; align-items: start;
}
.about-card {
  background: var(--surface-card); border-radius: var(--r-lg);
  padding: 2.25rem 2rem;
}
.about-mark {
  width: 4rem; height: 4rem;
  background-image: url('../assets/logo.png');
  background-image: image-set(url('../assets/logo.webp') type('image/webp'), url('/assets/logo.png') type('image/png'));
  background-size: 100%;
  background-position: 24% 51%;
  background-repeat: no-repeat;
  mix-blend-mode: multiply;
  margin: 0 auto 1.25rem;
}
.about-card__name {
  text-align: center;
  font-family: var(--font-display); font-size: 1.75rem; font-weight: 500; color: var(--ink);
  margin: 0 0 0.25rem;
}
.about-card__name .knot { color: var(--brand-red); }
.about-card__role {
  text-align: center; font-size: 0.75rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 1.5rem;
}
.about-card__meta { list-style: none; padding: 0; margin: 0; }
.about-card__meta li {
  display: grid; grid-template-columns: 5.5rem 1fr; gap: 0.75rem;
  padding: 0.75rem 0; border-bottom: 1px solid var(--hairline-soft);
  font-size: 0.8125rem;
}
.about-card__meta li:last-child { border-bottom: 0; }
.about-card__meta .key { color: var(--muted); }
.about-card__meta .val { color: var(--body-strong); font-weight: 500; }

.about-prose { display: flex; flex-direction: column; gap: 1.75rem; }
.about-prose h3 {
  font-family: var(--font-display); font-size: 2rem; font-weight: 500;
  color: var(--ink); margin: 0; line-height: 1.3; letter-spacing: -0.01em;
}
.about-prose p { font-size: 0.9375rem; line-height: 1.9; color: var(--body); margin: 0; }
.about-prose .lede { font-size: 1.0625rem; line-height: 1.85; color: var(--body-strong); }

.about-principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 0.75rem; }
.about-principle {
  border: 1px solid var(--hairline); border-radius: var(--r-md); padding: 1.125rem;
}
.about-principle__num { font-family: var(--font-display); font-size: 0.875rem; color: var(--primary); margin-bottom: 0.375rem; }
.about-principle__title { font-size: 0.875rem; font-weight: 600; color: var(--ink); margin: 0 0 0.25rem; }
.about-principle__desc { font-size: 0.75rem; color: var(--muted); margin: 0; line-height: 1.6; }

/* ===== Blog teaser ===== */
.blog-banner {
  background: var(--surface-soft); border-radius: var(--r-lg);
  padding: 2.5rem 3rem;
  display: grid; grid-template-columns: 1fr 1fr; gap: 3.5rem; align-items: center;
}
.blog-banner__head h3 {
  font-family: var(--font-display); font-size: 1.875rem; font-weight: 500;
  color: var(--ink); margin: 0 0 0.75rem; line-height: 1.3;
}
.blog-banner__head p { font-size: 0.875rem; color: var(--body); margin: 0; line-height: 1.8; }
.blog-banner__topics { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.blog-topic {
  display: inline-flex; align-items: center; gap: 0.375rem;
  padding: 0.375rem 0.875rem; border-radius: var(--r-pill);
  background: var(--canvas); border: 1px solid var(--hairline);
  font-size: 0.75rem; color: var(--body-strong);
}
.blog-topic .lock { font-family: var(--font-mono); color: var(--muted-soft); font-size: 0.625rem; }

/* ===== CTA + Form ===== */
.cta-band {
  background: var(--surface-dark); color: var(--on-dark);
  border-radius: var(--r-lg);
  padding: 4rem 3.5rem;
}
.cta-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 4rem; align-items: start; }
.cta-band h2 {
  font-family: var(--font-display); font-size: 2.375rem; font-weight: 500;
  color: var(--on-dark); margin: 0 0 1.25rem; line-height: 1.25;
}
.cta-band p { font-size: 0.9375rem; line-height: 1.85; color: var(--on-dark); margin: 0 0 1.5rem; }
.cta-checklist { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.625rem; }
.cta-checklist li {
  display: flex; align-items: center; gap: 0.75rem;
  font-size: 0.875rem; color: var(--on-dark);
}
.cta-checklist li::before {
  content: ""; width: 1rem; height: 1px; background: var(--accent-amber);
}

.form-card {
  background: rgba(248,247,243,0.04);
  border: 1px solid rgba(248,247,243,0.12);
  border-radius: var(--r-lg);
  padding: 2rem;
}
.form-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 1rem; }
.field { display: flex; flex-direction: column; gap: 0.5rem; }
.field--full { grid-column: 1 / -1; }
.field label {
  font-size: 0.75rem; color: var(--on-dark-soft); letter-spacing: 0.05em;
  display: flex; align-items: center; gap: 0.5rem;
}
.field label .req {
  background: var(--accent-amber); color: var(--surface-dark);
  font-size: 0.5625rem; padding: 0.0625rem 0.375rem; border-radius: 0.1875rem; font-weight: 600; letter-spacing: 0.05em;
}
.field input, .field textarea, .field select {
  background: rgba(248,247,243,0.06);
  border: 1px solid rgba(248,247,243,0.15);
  border-radius: var(--r-md);
  padding: 0.6875rem 0.875rem;
  font-family: var(--font-body); font-size: 0.875rem;
  color: var(--on-dark);
  outline: none;
  transition: border-color .15s ease, background .15s ease;
}
.field input::placeholder, .field textarea::placeholder { color: rgba(248,247,243,0.4); }
.field input:focus, .field textarea:focus, .field select:focus {
  border-color: rgba(248,247,243,0.5); background: rgba(248,247,243,0.1);
}
.field textarea { min-height: 7.5rem; resize: vertical; }
.form-foot { margin-top: 1.25rem; display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; flex-wrap: wrap; }
.form-foot .note { font-size: 0.75rem; color: var(--on-dark-soft); }
.form-sent { margin-top: 1.25rem; display: flex; align-items: center; gap: 1rem; padding: 1.25rem 1.5rem; background: rgba(34,197,94,0.12); border: 1px solid rgba(34,197,94,0.3); border-radius: var(--r-md); color: var(--success); }

/* ===== Footer ===== */
.site-footer {
  background: var(--surface-dark); color: var(--on-dark);
  padding: 3.5rem 0 2rem;
}
.site-footer__inner { max-width: var(--container); margin: 0 auto; padding: 0 2rem; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 3rem; padding-bottom: 2.5rem; border-bottom: 1px solid rgba(248,247,243,0.08); }
.footer-brand { display: flex; align-items: center; gap: 0.75rem; }
.footer-brand__mark {
  width: 2.25rem; height: 2.25rem;
  background-image: url('../assets/logo.png');
  background-image: image-set(url('../assets/logo.webp') type('image/webp'), url('../assets/logo.png') type('image/png'));
  background-size: 100%;
  background-position: 24% 51%;
  background-repeat: no-repeat;
  filter: brightness(0) invert(0.95);
  opacity: 0.95;
  border-radius: 0.25rem;
}
.footer-brand__name {
  font-family: var(--font-display); font-size: 1.375rem; font-weight: 500;
  color: var(--on-dark);
}
.footer-brand__name .knot { color: var(--brand-red); }
.footer-tagline { font-size: 0.8125rem; color: var(--on-dark-soft); margin-top: 1rem; line-height: 1.8; max-width: 17.5rem; }
.footer-col h4 {
  font-size: 0.6875rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--on-dark-soft); font-weight: 500; margin: 0 0 1rem;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.625rem; }
.footer-col li a { font-size: 0.8125rem; color: var(--on-dark); text-decoration: none; }
.footer-col li a:hover { color: var(--accent-amber); }
.footer-bottom {
  padding-top: 1.5rem; display: flex; align-items: center; justify-content: space-between;
  font-size: 0.75rem; color: var(--on-dark-soft);
}

/* ===== Sticky bottom CTA ===== */
.sticky-cta {
  position: fixed; left: 50%; bottom: 1.5rem; transform: translateX(-50%) translateY(120%);
  background: var(--ink); color: var(--on-primary);
  border-radius: var(--r-pill);
  padding: 0.375rem 0.375rem 0.375rem 1.5rem;
  display: inline-flex; align-items: center; gap: 1rem;
  box-shadow: 0 0.75rem 1.875rem -0.625rem rgba(20,20,28,0.4);
  transition: transform .35s cubic-bezier(.4,.0,.2,1);
  z-index: 40;
}
.sticky-cta.is-visible { transform: translateX(-50%) translateY(0); }
.sticky-cta__text { font-size: 0.875rem; font-weight: 500; display: flex; align-items: center; gap: 0.75rem; }
.sticky-cta__text .dot { width: 0.5rem; height: 0.5rem; background: var(--success); border-radius: 50%; }
.sticky-cta__btn {
  background: var(--accent-amber); color: var(--surface-dark);
  border: 0; border-radius: var(--r-pill);
  padding: 0.625rem 1.375rem; font-weight: 600; font-size: 0.875rem;
  display: inline-flex; align-items: center; gap: 0.375rem;
  cursor: pointer;
}
.sticky-cta__btn:hover { background: #f0b572; }

/* ===== Icon ===== */
.icon { display: inline-flex; align-items: center; justify-content: center; }

/* ===== Misc utilities ===== */
.flex-spacer { flex: 1; }
.divider-text {
  display: flex; align-items: center; gap: 1rem; margin: 4rem 0;
  font-size: 0.75rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--muted);
}
.divider-text::before, .divider-text::after { content: ""; flex: 1; height: 1px; background: var(--hairline); }

/* ===== 1110px以下：other-cases-grid を2列に ===== */
@media (max-width: 1110px) {
  .other-cases-grid { grid-template-columns: repeat(2, 1fr); }
}